function child_group(select,field,url){
  try{
    var value=select.options[select.selectedIndex].value;
    var name =select.options[select.selectedIndex].innerHTML;
    if(value>0){
      document.location=url+"/group/"+field+"/"+name;
    }
  }catch(e){
    alert("Error child_group"+e.message);
  }
}